3rd Summative Test - Electric Potential and Capacitance

What do you call to the energy needed to move a unit charge against electric field?

• Potential Difference

• Electric Potential

• Electric Potential Energy

• Gravitational Potential Energy

The unit of  electric potential energy is equivalent to?

• N/C

• C

• N·m²/C²

• N·m

1 volt is equal to ____.

• 1 J/C

• 1 C/N

• 1 N/C

• 1 C/J

Of the following quantities, which is vector in character?

• Electric Charge

• Electric Potential Energy

• Electric Potential

• Electric Field

As a proton moves in the direction the electric field lines...

• it is moving from low potential to high potential and gaining electric potential energy.

• it is moving from low potential to high potential and losing electric potential energy.

• it is moving from high potential to low potential and losing electric potential energy.

• it is moving from high potential to low potential and gaining electric potential energy.

A farad is the same as a:

• V/C

• C/V

• V/J

• J/V

A capacitor C “has a charge Q”. The actual charges on its plates are:

• Q, Q

• Q/2, Q/2

• Q, -Q

• Q/2, −Q/2

How is the direction of the electric field lines related to the equipotential surface?

• perpendicular

• parallel

• depends on the sign of the charge

• undetermined

An electron moves from point i to point f , in the direction of a uniform electric field. During this displacement:

• the work done by the field is positive and the potential energy of the electron-field system increases.

• the work done by the field is negative and the potential energy of the electron-field system increases.

• the work done by the field is positive and the potential energy of the electron-field system decreases.

• the work done by the field is negative and the potential energy of the electron-field system decreases.

The capacitance of a parallel-plate capacitor is:

• proportional to the plate area

• proportional to the charge stored

• independent of any material inserted between the plates

• proportional to the potential difference of the plates